linux-kernel - [PATCH 5.4 088/183] drm/tegra: dsi: Fix some error handling paths in tegra_dsi

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Date: Sun, 24 Mar 2024 19:45:01 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Thierry Reding <treding@...dia.com>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 088/183] drm/tegra: dsi: Fix some error handling paths in tegra_dsi_probe()

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

[ Upstream commit 830c1ded356369cd1303e8bb87ce3fea6e744de8 ]

If an error occurs after calling tegra_output_probe(),
tegra_output_remove() should be called as already done in the remove
function.

Fixes: dec727399a4b ("drm/tegra: Add DSI support")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Signed-off-by: Thierry Reding <treding@...dia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/16820073278d031f6c474a08d5f22a255158585e.1693667005.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/tegra/dsi.c | 54 ++++++++++++++++++++++++-------------
 1 file changed, 35 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
index cc0ac038a4208..072a4c1d8eff4 100644
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -1503,44 +1503,58 @@ static int tegra_dsi_probe(struct platform_device *pdev)
 
 	if (!pdev->dev.pm_domain) {
 		dsi->rst = devm_reset_control_get(&pdev->dev, "dsi");
-		if (IS_ERR(dsi->rst))
-			return PTR_ERR(dsi->rst);
+		if (IS_ERR(dsi->rst)) {
+			err = PTR_ERR(dsi->rst);
+			goto remove;
+		}
 	}
 
 	dsi->clk = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(dsi->clk))
-		return dev_err_probe(&pdev->dev, PTR_ERR(dsi->clk),
-				     "cannot get DSI clock\n");
+	if (IS_ERR(dsi->clk)) {
+		err = dev_err_probe(&pdev->dev, PTR_ERR(dsi->clk),
+				    "cannot get DSI clock\n");
+		goto remove;
+	}
 
 	dsi->clk_lp = devm_clk_get(&pdev->dev, "lp");
-	if (IS_ERR(dsi->clk_lp))
-		return dev_err_probe(&pdev->dev, PTR_ERR(dsi->clk_lp),
-				     "cannot get low-power clock\n");
+	if (IS_ERR(dsi->clk_lp)) {
+		err = dev_err_probe(&pdev->dev, PTR_ERR(dsi->clk_lp),
+				    "cannot get low-power clock\n");
+		goto remove;
+	}
 
 	dsi->clk_parent = devm_clk_get(&pdev->dev, "parent");
-	if (IS_ERR(dsi->clk_parent))
-		return dev_err_probe(&pdev->dev, PTR_ERR(dsi->clk_parent),
-				     "cannot get parent clock\n");
+	if (IS_ERR(dsi->clk_parent)) {
+		err = dev_err_probe(&pdev->dev, PTR_ERR(dsi->clk_parent),
+				    "cannot get parent clock\n");
+		goto remove;
+	}
 
 	dsi->vdd = devm_regulator_get(&pdev->dev, "avdd-dsi-csi");
-	if (IS_ERR(dsi->vdd))
-		return dev_err_probe(&pdev->dev, PTR_ERR(dsi->vdd),
-				     "cannot get VDD supply\n");
+	if (IS_ERR(dsi->vdd)) {
+		err = dev_err_probe(&pdev->dev, PTR_ERR(dsi->vdd),
+				    "cannot get VDD supply\n");
+		goto remove;
+	}
 
 	err = tegra_dsi_setup_clocks(dsi);
 	if (err < 0) {
 		dev_err(&pdev->dev, "cannot setup clocks\n");
-		return err;
+		goto remove;
 	}
 
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	dsi->regs = devm_ioremap_resource(&pdev->dev, regs);
-	if (IS_ERR(dsi->regs))
-		return PTR_ERR(dsi->regs);
+	if (IS_ERR(dsi->regs)) {
+		err = PTR_ERR(dsi->regs);
+		goto remove;
+	}
 
 	dsi->mipi = tegra_mipi_request(&pdev->dev, pdev->dev.of_node);
-	if (IS_ERR(dsi->mipi))
-		return PTR_ERR(dsi->mipi);
+	if (IS_ERR(dsi->mipi)) {
+		err = PTR_ERR(dsi->mipi);
+		goto remove;
+	}
 
 	dsi->host.ops = &tegra_dsi_host_ops;
 	dsi->host.dev = &pdev->dev;
@@ -1571,6 +1585,8 @@ static int tegra_dsi_probe(struct platform_device *pdev)
 	mipi_dsi_host_unregister(&dsi->host);
 mipi_free:
 	tegra_mipi_free(dsi->mipi);
+remove:
+	tegra_output_remove(&dsi->output);
 	return err;
 }
 
-- 
2.43.0